Year	% of relevant age group
1973	103.052
1974	101.0859
1975	102.3932
1976	104.2515
1977	104.701
1978	104.3418
1979	104.6069
1980	104.6768
1981	103.7429
1982	103.107
1983	102.5691
1984	103.6894
1985	102.1741
1986	102.5901
1987	103.7865
1988	104.0914
1989	103.3486
1990	103.2856
1991	102.1066
1992	100.5334
1993	102.9471
1994	100.3565
1995	102.031
1996	103.9227
1997	104.3903
1998	102.0717
1999	101.3735
2000	100.9211
2001	101.3493
2002	101.2241
2003	100.7451
2004	101.9669
2005	102.0246
2006	102.3103
2007	104.8539
2008	104.4169
2009	102.7275
2010	101.5524
2011	101.4319
2012	99.70899
2013	99.64479
2014	100.6842
2015	101.7034
2016	100.604
2017	98.48883
2018	99.29623